Maybe it's a xianxia story.
They're not related, so it's not incest, but these twins look exactly alike.
They're both psychologically warped, and both have serious issues, just like the author.
To eliminate the demon seed, the world sacrificed millions of lives to create a copy of me, then placed me inside the demon seed's embryo. I was to absorb its power and smother it before it was born.
They made me look just like it, so it would love me and cherish me as if it loved only itself.
I even gleefully twisted my gender to match what it had been at birth.
Heehee, we're both boys. We're exactly alike.
I was born from millions of innocent lives, and the world sought to fight evil with evil.
So, take a guess: which of us is the demon seed?
Guess, guess. Which one is it, and which one am I?
1. Yandere shou, yandere shou, yandere shou. A crazy, unhinged character who likes saying things like "nee," "ah," "oh," and "hee." He's inhuman and barely has any humanity, but the gong will completely reform him.
2. I love writing yandere characters. If you can't handle yanderes who have no normal thought processes and are bloodthirsty and cold-hearted, leave now. Run! Get far away!
3. A powerful shou with an overbearing need to control, who constantly says "I love you" but is actually cold and heartless, born of millions of resentments, paired with a gong who's willing to be controlled by the shou. He seems gentle, delicate, and deeply calculating, but if you leave me, I'll go completely crazy.
4. Some of the gong and shou's traits will change.
5. Blurb written on August 2, 2023.
Theme: I never expected it, but maybe the author is crazy.